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819 Striker Avenue Suite 8 <br /> Sequoia Sacramento C 95834 <br /> (916)922 1-9600 <br /> FAX(916)921-0 100 <br /> Analytical w\mw sequoialab5`om <br /> Gettler-Ryan-Rancho Cordova Project Unocal 0187, Stockton CA Sampled 11/3/00 to 11/6/00 <br /> 3164 Gold Camp Dr, Ste 240 Project Number N/A Received 11/7100 <br /> Rancho Cordova CA 95670 Project Manager David Herzog Reported 11/16/00 <br /> Total Purgeable Hydrocarbons(C6-C12), BTEX and MTBE by DHS LUFT/Quality Control <br /> Sequoia Analytical-Sacramento <br /> Date Spike Sample QC Reporting Limit Recov RPD RPD <br /> Analyte Analvzed Level Result Result Units Recov Limits % Limit % Notes* <br /> Matrix Spike(continued) 0110214-MSI S011119-02 <br /> Xylenes(total) 11/15/00 0 600 ND 0 435 mg/kg 600-140 725 <br /> Methyl tert-butyl ether 0200 ND 0 121 600-140 605 <br /> Surrogate a a a-Trefluorotoluene 0200 0 224 600-140 112 <br /> Matrix Spike DuA 0110214-MSDI S01 1 1 19-02 <br /> Benzene 11115100 0200 ND 0 140 mg/kg 600-140 700 25 0 364 <br /> Toluene 0200 ND 0 160 600-140 800 25 0 317 <br /> Cthylbenzene 0200 ND 0 172 600-140 860 25 0 176 <br /> Xylenes(total) 0 600 ND 0 440 600-140 733 25 0 l 10 <br /> Methyl tert-butyl ether 0200 ND 0 130 600-140 65 0 25 0 7 17 <br /> Surrogate a a a-Trip uorotoluene 0200 0 245 600-140 123 <br /> • <br /> Sequoia Analytical-Sacramento *Refer to end of report for text of notes and definitions <br /> Page 14 of 15 <br />